This little gem was brought to my attention by the originator of it, Carter Hansen. I checked it out and I must say it is absolutely great! Most themes I have come across have simply been so obtrusive I immediately delete them...but this theme is different. The sounds are nice and low-key...and appropriately humorous! Hats off to Carter!
Download the ZIP archive, which creates two ZIPs, one is the slideshow screensaver (very cool) and the other is all the normal Theme files. The slideshow ZIP unzips into the current directory, so be careful where you unzip it. The theme ZIP unzips into a Tolkien3 directory, 2 Theme files, and a Readme. The Readme is very informative and tells you everything you'll need to know. Either read it here, or be sure to unzip the theme ZIP first and read it on your own HD.